Drop Down Menu Boxes have become transparent how do I rest..

All of a sudden all my drop down menu boxes have become transparent. The
only way to see the choices is to mouse over the menu. How do I restore them
back to the way they were? VISIBLE!! I am running Windows XP Pro on an Ibm
300Pl computer.

Thanks - All help would be appreciated. Telguy99!!

I got hit bu a trojan & before I disconnected it made my menus this way. I
hope this solution works